Tom M'Guinn

Have you checked to confirm that the piston pin retaining clip is still there (i.e., that it did not pop out and cause this chaos?)?

Chris White

Can you send me the side views in greater resolution?
There looks like there was a ton of contamination – I can see rust but it is tough to make out things at the detail level in the pics. It looks like the rings were trapped in place – very strange for the 2nd ring to be pinched like that.

Did you engine spend any time in New Orleans last year?!?

SchnellerUmsetzer

Damn, I burnt a couple of holes in a set of J&E's with a NA 2.8 lt.

That is an Ugly mess!

theedge

http://thedge.info/index.php?d=my951...ailure%2Fhires

Theres some highres shots of the piston and bore and stuff. Probably lots of duplicates and such.

Claus Groth

I go with NASAhere for $275 for the weekend. We go in March. BTW, there is no entrance fee to watch. Let me know if you want more info.

Buckaroo Banzi

I agree....Lots and Lots of contamination..
Your engine inards look like it spent time as a out board motor for a U-Boat..
Lots of rust and gunk. In one of your HI-Res pictures one of the pistons looked like it was covered in SAND????

Time for a.....

lart951

Claus, I would love to meet with you there, let me know when you are going again.


Tia

Luis

Rock

Morgenstern ach scheine

wirf ein warmes licht auf ein Herz das bricht

lart951

Btw, rock you look awesome on the Who we are post your pict. thread on OT

Nunca pongas tu foto en el internet porque lart951 te va a joder.

Rock

Ohhh nooo lol. I just left myself open for a ****load of lart photoshop pictures hahahahahah

theedge

Thats from the cylinder wall. No rust in the engine. The piston and rod look kinda funky in some of the pics because id just finished hosing it down with brake cleaner, so its got that film/whiteish stuff on it.

Everything was clean when I put it together, I made damn sure of that to avoid exactly this. Or try to that is. The metal shavings all over the headgasket must be from the cylinder head. Last time I go to that shop.

Zero10

You had head work done?...
Is it possible that they did not flush all of the metal flakes out of the head? I could see that causing this kind of damage.

theedge

Looks like they didnt. I gave it some blasts of compressed air, but out of a can since thats all I had.

I made sure all the chambers were clean, all the metal shavings were in the coolant passeges so they were on the headgasket. Im surprised no one has noticed them

Chris White

Definitely massive contamination.
But it looks like more than just junk from the ‘top side’. As I understand you replaced the crank bearing so you had the engine apart. The outside of the engine block looks very clean – so you did something to clean that up. But the piston wrist pin area looks like crap. Lots of ‘baked on’ stuff. Not normal for any 944. Did it look like that when you put it back together?

The end cause of failure is the rings were trapped in place by contamination. Normally they should be free to move around and in the pics you can see that they are stuck. The shots of the ring ends really show this.

There looks to be a lot of contamination between the first and second ring – I would guess this is from lots of raw fuel washing down ‘stuff’ until it was trapped between the rings.

By any chance did you take some ‘before’ pictures when you had the engine apart?